Hose or pipe coupling.



A. BENZINGER.

HOSE OR PIPE COUPLING.

APPLICATION meu Aue. 18. 1811.

Wflf hmmm F@b.26,1918.

ALBERT BENZINGER, OF CININNATI, HIQ, GF N-THIRD T0 WALTER M.

i SCHOENL'E' CINGIIN''I, GHIO'. i

i Hosn on rrrn oonrmne.

metres.

Speoification of Letters Patent.

ratenteu net, ee, mie;

Application filel August 18, 19-17. Serial No. 188,975.

Tolall'whom it may Gomera:

'Be it knownv that I, ALBERT Bnnzinonr., a citizen of the United States, 4and a resident of Cincinnati, in the county of Hamilton and Etate of Ohio, have invented certain new and useful Improvements in l'lose i or lipe Couplings, of which the following is a specification. r

My invention relates to hose or pipe couplings, and its object is to provide a coupling` which can' be readily'coupled and uncoupled, and which will amply provide against lealrage when coupled, and not have its parts unduly exposed to damage Vwhen uncoupled. i

My invention consists in. the combination of parts and in the details of construction and arrangement of parts as will hereinafter be more fully described and claimed In the drawings:

Figure 1 is anv end view of the female member;

VFig. 2 is a similar view of the male member; i

Fig. 3 is a longitudinal section on a plane corresponding to the lines 3-3 of Figs. 1 and 2, showing the members uncoupled; and i Fig. 4 is a similar view showing the member coupled.

The female member 1 of hollow, cylindrical formation has its interior of somewhat 2greater diameter from its outer end inward for a considerable distance, and this part is provided with threads or corrugations 2, by means of which the member 1 is connectedto a pipe or hose in a wellknown manner; it being'v understood that the inner end of the pipe or hose preferably abuts closely against the annular shoulder 3 where this part of greater diameter merg'es into the inner part 11 'of lesser di'ameter which is left smooth, and preferablv of such diameter as to come about flush with the interior surface of the pipe or hose, when connected as above described.

Exteriorly, this female member 1 has,

about midway of its lenztln'threads 5 around i it.` Extending from the inner end (5 of the female member 1 parallel with its axis and preferab'ly diametrically opposite, are straight grooves 7 in the exterior surface of the Inemberl, which terminate a short dis- ,tance froml the tlnieads 5; and. Sta'ting around the member 1 in both directions from each groove 7, are branch grooves 8 and 8'. rli`he grooves 8 start from the end of the respective grooves 7, and the grooves 8' start from said grooves 7 a short distance from the inner end (3. These grooves 8 and 8' pass around the member helicallv like screw threads; it being` understood that each two grooves 8 and 8' on the same side of a respective groove are parallel. These grooves may extend any suitable distance around the member 1. As here shown, each groove extcnds about Vone-sixth of the way' around. The end part of each groove curves slightly back t Ward the inner end 6, so that each groove 8 or 8' terminatcs in a poclrettlor 9'. VAlso, preferably, the sides of the grooves 7,78 and 8', and of the pockets 9 and 9' are unoercut throughout their lengths adjacent to the bottoms of the grooves', so that lateral ledges 10, 11 and 11' are provided next to the bottoms of the respective grooves. i

A thimble '12 of hollow, cylindrical format-ion is of reduced interior diameter for a short distance inward from its outer end, and in'this reduced part is provided with threads 18 to screw on to the 'threads on the exterior of the female member 1. VVhere this threaded part terminates inwardly of the thimble and meets the inner part of greater diameter, anannular shoulder 111 is formed, and immediately adjacent to this shoulder 11, the interior of the thimble has a shallow annular groove 15 turned in it, so that immediately adjaoent to this shoulder, the interior of the thimble is of slightly greater diameter than the part from this groove 15 to the inner end 16 of the thimble, which part is left smooth- A gasket 17 material fitsiin the space around the female member Lagainst the'shoulder 1-1, and out in the groove lof the thimble 12; being hold inl position by thus extending out into said groove 15. The innerrend 6 of the female member 1 is preferably left flat in a plane at right angles to the axis of the member radiall inwardly; butv 'radiall outwardly inthe zone of the `{frooves 7, where they start in from this end G., the surface prcferably recedes radially outwardly, so that it has a conical formation. The thimble' 12 is of such length relativeto the 15 of ,thethimble inv over the inner end of the I part'of the Vfemale member 1 vbetween its threads 5 and end 6,'that when'the thimble 12 'is' attached to the :member 1 by means 'of the threads 5 andf13, the inner end 16 of;

the'thimble V12 WilleXtend for a consider- V .able distance past the inner end 6V of the member 1 all around. It will be understood i that' the-threads 5 and 13 should fitl'tightly,

member 1. The radially outward edges of bothuends 'of the thimble 12 are preferably roundecLon amp'leradii;v the end 1G should be left flat in aiplane atV right angles to the aXis. f

The outer end part of the member 1 may -have radially projecting lugs18 for graspo ingV it to turn it, or hold it from turning.

However, it will be understood that these lugsv should not project very far., and equivalent ,means may be substitnted for these; since one of the requirements of a hose coupling isrthat it shall have noabruptly presented'parts to catch on objects across which the lhose is being dragged. It is for this reason thatthe outer'end of the thimble preferably hasv its edge rounded, asrshown, and as above alluded to.

The male member 19 of 'hollow cylindrif cal formation, has its outer end provided with the internal threads or corrugations 20 and the shoulder 21, where this corrugated or Vthreaded part merges into Vthe inner smooth part 22 of lesser diameter. It will be understood that these parts 20, 21 and 22 of the male member 19 are like the parts 2, 3 and 4, respectively,of the female member 1. The smoothl Vpart 22, however, extends only Va short distance fromthe shoulder 21 in- Wardlyr; the inner end part of the interior ``of the male member V19 being of such internal diameter as vtorslip snugly around the smooth exterior of the inner end part of the' Vfemale-member 1 ;while exteriorly this inner end partcof-the'male member 19 is smooth and of,V such diameter as to fit' snugly inside the smooth inner end Vpart of the thimble 12.1v That is to say, when the parts are coui p1ed,this inner Aendv part of the male member l9jfits snugly in the annularspace left between'rthe inner Vend partsof the female i .member 1` andv its thimble 12'., The inner end 23 of themale member-.19 is left flat at right angles to the axis' of the member Vtoseat.snugly against the'face of the' gasket 17=where`it is exposed in this annularV space. Projecting inwardly from the" interior surface. of4 this inner end part, of the male member 19, are `buttons or studs 24 and 24',

respectively, remote from and nearer to the inner end of the member 19, and, preferably, in diametrically oppositepairs, or disposed in accordance with the disposition of the grooves 7 around the female member 1; and

Vthosev of each pair being on a line parallel with the axis of the member. The inner end of each stud 241 or 21' is provided with a radially. extending annular flange 25 or 25/, respectively, so that each stud is substantially of the shapeof a short rivet with a flat head. As shown in the drawing, these p studs are integral with the member 19; but

it'will be understood that they may bc made separately and secured therein in any suitable well-known manner. The important requirement in the shaping and location of .these studs 21 and 241/ is that the pairs will enter the respective grooves 7 in the female member 1 as the inner part of the male member 19 enters the annular space between the female member 1 and its thimble 12, and when the inner end 23 has abutted the gasket 17, these studs 25 and 25' will be opposite the branch grooves 8 and 8', respectively. Then when the members l and 19 are rotated relativc` to each other in either direction, thL` studs will enter the respective branch grooves, and in following these grooves, the members 1 and 19, will be drawn more closely together, compressing the gasket 17. Then when the studs reach the ends of the respective grooves and may move back into the respective pockets 9 and 9', the elastic gasket 17 will force the members 1 and 19 slightly apart again and hold the studs in the pockets; thus looking the members together until such pressure is applied to them externally as to again compress the gasket 17 to the eXte-nt that would permit the studs to leave the pockets and pass out again along the branch grooves to the longitudinal grooves 7 therealong entirely to released position.

lVhere the part 22 terminates inwardly, a shoulder 26 is formed in the male member 19 facingtowai'd the inner end 6 of the female member 1. This shoulder is made flat in a plane at right angles to the aXis of the member,- and immediately adjacent to it a shallow annular groove 27 is formed in the interior of the member 19. An annular gaskct 28 of rubber or other suitable elastic gasket material, is held against this shoulder 26 by fitting out in this groove 27 in the same manner as the gasket 17 is held in the thimble 12 against the shoulder'll.

On the veXterior of the male member 19 is an outwardly extending annular fiange 29 `with a face presented toward the inner end 16 of the thinfile 12, and preferably havmg an axially veix'tendmg annular bead 30 ientirely around this face. Immediately ad jacent to this face, the exterior of the member 19 has formed in it a shallow annular member 1.V This Willproduce the desired Wedgingefect tol add the frictional to the -expansive holding action and yet When the gasketszhav'e' been Vagain compressed, Vthe studs Will v readily 7leave thepockets and travel along the grooves to released position,

as the parts arerelatively turned and then longitudinally drawn apart in the manner hereinbefore described. i

Having fully described my invention, What I elaimzas newand desire to secure by Letters Patent is:

l. n a hose or pipecoupling, a member, an interiorly located elastic gasket on said member, a Vmating member having an interiorly located seat to abut said gasket when themembers are coupled, this member havan interorlyolocated groove extending 'hellcally away. from said` seat, and te'rmmat- 111g in a .pocket extendmg part of the Way back towardfsaidseat, said pocket being un- -dercut next to its bottom to form a ledge,

and the first-mentioned member having an interiorly located -stud to enter said pocket along said groove, said stud having a flange to Wedge under said ledge, and said'gasket being compressed under the pressure of said seat as said stud travels along said groove Copies 'of this pa'lzentmay bo obtained for eXterior of said female member with an inner end part spaced away from the grooved eXterior of the member, leaving an annular space entirely therearound, and this inner end part extending a considerable distance past the inner end that forms the seat on said member to form a guide toward and a guard for said seat, a male member adapted to fit inside said annular space, an inwardly extending lug on the inside of said male member interiorly thereof adapted to enter said groove and travel there-along into said pocket as said members are relatively rotated, a gasket of elastic material held inside said male member which said end of said female member compresses when said stud travelsv along said groove, and which partially expands again when said stud enters said pocket, whereby said parts are locked together, a second elastic gasket held aXially against said thimble inside its annular space, and compressed by the entering end of said male member, an annular extension around the cxterior of said male member, and a third gasket held axially against this extension and com n'essed by the end of said thimble, said gaskcts being compressed and partially eXpanding in parallel with the compression and partial expansion of the first-mentioned gasket, and thereby acting in parallel in maintaining` the locked condition, and being in series in hindering leakage during said condition.

ALBERT BENZINGER.

Witnesses:

JAMns N, RAMSEY, CLAYRENCE PERDEW.

five cents each, by addressing the Commissioner of Patents,

Washington, D. C." 

